While it might look like a potential traffic jam waiting to happen, every vehicle in the motorcade serves a distinct purpose. The amount of resources dedicated to moving the President of the United States from place to place by the Secret Service is staggering. With that said, the security motorcade is not unique to just diplomatic arenas. You will find scaled down versions in almost every other area of Executive Protection. The unfortunate reality is that the majority of attacks occur in and around the vehicle so the rings of protection have to extend beyond just arms length.